7.0 Appendix A - Maintenance Guide
15
2. Fasten the knife lifter to the knife. The knife lifter should be angled into the machine, right
end first. It can then be slid up into place. Thread the handles into the knife and firmly
tighten them by hand.
3. Place a 12” or longer piece of chipboard directly underneath the knife.
4. Place an empty scabbard on the tabletop.
5. Remove the two remaining screws from the knife.
6. While holding the knife lifter up, loosen the the knife lifter handles from the knife just
enough to release the knife from the knife bar.
7. Lower the knife to clear the knife bar. Move it to the far right and pull the left-end of the
knife out of the machine.
8. Carefully place the knife and lifter onto the scabbard.
9. Remove the lifter from the knife.
10. Place both thumbs on the bottom protected portion of the scabbard and use all fingers on
the top portion of the knife to position it over the screw holes in the scabbard.
11. Thread the scabbard screws into the scabbard to secure the knife.
Disconnect main power.
See Section 2.2 Power Lockout Procedure.
Even worn knives are very sharp! Never touch an exposed blade.
Knife changing is a one person operation. Failure to follow
instructions could result in severe lacerations or dismemberment.
Knife Installation:
1. Place a 12” or longer piece of chipboard directly underneath the knife.
2. Lift the hood and place the new knife and scabbard on the tabletop. The top of the knife
should face the knife bar.
3. Remove the scabbard screws.
4. Place all fingers on the top edge of the scabbard and thumbs in the tapped holes in the
knife.
5. Slide the knife up the scabbard far enough to expose the sharp edge.
6. Thread the handles of the knife lifter all the way into the knife, then back them out ½ turn.
7. Angle the knife and lifter into the machine right-end first.
8. Raise the handles into the slots of the knife bar.
9. Firmly hand-tighten the handles of the knife lifter locking the knife in place. Make sure
the knife is all the way up in the slots on both ends.
10. Insert and tighten the two outside knife screws.
11. Loosen the knife lifter handles and remove the knife lifter from the machine.
12. Insert the scabbard screws into the scabbard and store the scabbard and lifter for later
use.
7.1.3 Knife Disposal
The used knife must be mounted to the scabbard. It should be properly discarded. Check with the
appropriate authorities (local code or waste-management company) for proper disposal. You may
also check with your regrind shop or Authorized Challenge Dealer for disposal options.
7.1.4 Hood Switch Adjustment
The hood switch mechanism was designed to disable the machine from operation if the hood is
rotated beyond 2
o
. The machine should not be operated if the hood switch is improperly adjusted.
To adjust the hood switch:
Disconnect main power.
See Section 2.2 Power Lockout Procedure.
NOTICE: UNSUPPORTED PRODUCT!
NO TECHNICAL SUPPORT AVAILABLE!
NO REPAIR PARTS AVAILABLE!
